20.500.12556/RUL-143299 Influence of stabilization additive on rheological, thermal and mechanical properties of recycled polypropylene To decrease the amount of plastic waste, the use of recycling techniques become a necessity. However, numerous recycling cycles result in the mechanical, thermal, and chemical degradation of the polymer, which leads to an inefficient use of recycled polymers for the production of plastic products. In this study, the effects of recycling and the improvement of polymer performance with the incorporation of an additive into recycled polypropylene was studied by spectroscopic, rheological, optical, and mechanical characterization techniques. The results showed that after 20 recycling steps of mechanical processing of polypropylene, the main degradation processes of polypropylene are chain scission of polymer chains and oxidation, which can be improved by the addition of a stabilizing additive. It was shown that a small amount of an additive significantly improves the properties of the recycled polypropylene up to the 20th reprocessing cycle. The use of an additive improves the rheological properties of the recycled melt, surface properties, and time-dependent mechanical properties of solid polypropylene since it was shown that the additive acts as a hardener and additionally crosslinks the recycled polymer chains. recycling polypropylene stabilization additive rheological properties thermal properties mechanical properties recikliranje polipropilen stabilizacijski aditivi reološke lastnosti termične lastnosti mehanske lastnosti true false true Angleški jezik Slovenski jezik Članek v reviji 2022-12-13 10:55:55 2022-12-13 10:56:00 2024-02-16 03:52:21 0000-00-00 00:00:00 2022 0 0 16 str. iss. 24, art. 5438 Vol. 14 Dec. 2022 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 678:531/532.135 2073-4360 10.3390/polym14245438 133580547 polymers-14-05438-v2.pdf polymers-14-05438-v2.pdf 1 50795F1347DC5833E568418F7A4E3CC2 5e4c716c882a0e95d98c5f8eabf1c2e444e1da30c801d325a26740d8b553fd32 0f2dce6f-cc06-11ee-92ed-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=180907 https://www.mdpi.com/2073-4360/14/24/5438 1 2dc4218c-7acc-11ed-9c94-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=164931 Fakulteta za strojništvo 0 0 0